Bug 1377827 - Don't try to initialize texture data unless the texture is otherwise complete. - r=daoshengmu

MozReview-Commit-ID: 4alHrHS2vMJ

dom/canvas/WebGLTexture.cpp

@@ -320,11 +320,6 @@ WebGLTexture::IsComplete(const char* funcName, uint32_t texUnit,
         return false;
     }
 
-    if (!EnsureLevelInitialized(funcName, mBaseMipmapLevel)) {
-        *out_initFailed = true;
-        return false;
-    }
-
     // Texture completeness is established at GLES 3.0.4, p160-161.
     // "[A] texture is complete unless any of the following conditions hold true:"
 
@@ -452,6 +447,11 @@ WebGLTexture::IsComplete(const char* funcName, uint32_t texUnit,
         // (already covered)
     }
 
+    if (!EnsureLevelInitialized(funcName, mBaseMipmapLevel)) {
+        *out_initFailed = true;
+        return false;
+    }
+
     return true;
 }